/*
 * Copyright (C) 2016+     AzerothCore <www.azerothcore.org>, released under GNU GPL v2 license: https://github.com/azerothcore/azerothcore-wotlk/blob/master/LICENSE-GPL2
 * Copyright (C) 2008-2016 TrinityCore <http://www.trinitycore.org/>
 * Copyright (C) 2005-2009 MaNGOS <http://getmangos.com/>
 */

/*
 * Ordered alphabetically using scriptname.
 * Scriptnames of files in this file should be prefixed with "npc_pet_hun_".
 */

#include "ScriptMgr.h"
#include "ScriptedCreature.h"

enum HunterSpells
{
    SPELL_HUNTER_CRIPPLING_POISON       = 30981, // Viper
    SPELL_HUNTER_DEADLY_POISON_PASSIVE  = 34657, // Venomous Snake
    SPELL_HUNTER_MIND_NUMBING_POISON    = 25810, // Viper
    SPELL_HUNTER_GLYPH_OF_SNAKE_TRAP    = 56849,
    SPELL_HUNTER_PET_SCALING            = 62915
};

enum HunterCreatures
{
    NPC_HUNTER_VIPER                    = 19921
};

class npc_pet_hunter_snake_trap : public CreatureScript
{
public:
    npc_pet_hunter_snake_trap() : CreatureScript("npc_pet_hunter_snake_trap") { }

    struct npc_pet_hunter_snake_trapAI : public ScriptedAI
    {
        npc_pet_hunter_snake_trapAI(Creature* creature) : ScriptedAI(creature) { _init = false; }

        void Reset()
        {
            _spellTimer = urand(1500, 3000);

            // Start attacking attacker of owner on first ai update after spawn - move in line of sight may choose better target
            if (!me->GetVictim())
                if (Unit* tgt = me->SelectNearestTarget(10.0f))
                {
                    me->AddThreat(tgt, 100000.0f);
                    AttackStart(tgt);
                }
        }

        void EnterEvadeMode()
        {
            // _EnterEvadeMode();
            me->DeleteThreatList();
            me->CombatStop(true);
            me->LoadCreaturesAddon(true);
            me->SetLootRecipient(nullptr);
            me->ResetPlayerDamageReq();
            me->SetLastDamagedTime(0);

            me->AddUnitState(UNIT_STATE_EVADE);
            me->GetMotionMaster()->MoveTargetedHome();

            Reset();
        }

        //Redefined for random target selection:
        void MoveInLineOfSight(Unit* who)
        {
            if (!me->GetVictim() && who->isTargetableForAttack() && (me->IsHostileTo(who)) && who->isInAccessiblePlaceFor(me))
            {
                if (me->GetDistanceZ(who) > CREATURE_Z_ATTACK_RANGE)
                    return;

                if (me->IsWithinDistInMap(who, 10.0f))
                {
                    me->AddThreat(who, 100000.0f);
                    AttackStart(who);
                }
            }
        }

        void UpdateAI(uint32 diff)
        {
            if (!UpdateVictim())
                return;

            if (me->GetVictim()->HasBreakableByDamageCrowdControlAura(me))
            {
                me->InterruptNonMeleeSpells(false);
                return;
            }

            if (!_init)
            {
                _init = true;

                CreatureTemplate const* Info = me->GetCreatureTemplate();
                uint32 health = uint32(107 * (me->getLevel() - 40) * 0.025f);
                me->SetCreateHealth(health);

                for (uint8 stat = 0; stat < MAX_STATS; ++stat)
                {
                    me->SetStat(Stats(stat), 0);
                    me->SetCreateStat(Stats(stat), 0);
                }

                me->SetModifierValue(UNIT_MOD_HEALTH, BASE_VALUE, (float)health);
                me->SetMaxHealth(health);
                //Add delta to make them not all hit the same time
                uint32 delta = urand(0, 700);
                me->SetAttackTime(BASE_ATTACK, Info->BaseAttackTime + delta);
                me->SetStatFloatValue(UNIT_FIELD_RANGED_ATTACK_POWER, float(Info->attackpower));
                me->CastSpell(me, SPELL_HUNTER_DEADLY_POISON_PASSIVE, true);

                // Glyph of Snake Trap
                if (Unit* owner = me->GetOwner())
                    if (owner->GetAuraEffectDummy(SPELL_HUNTER_GLYPH_OF_SNAKE_TRAP))
                        me->CastSpell(me, SPELL_HUNTER_PET_SCALING, true);
            }

            _spellTimer += diff;
            if (_spellTimer >= 3000)
            {
                if (urand(0, 2) == 0) // 33% chance to cast
                    DoCastVictim(RAND(SPELL_HUNTER_MIND_NUMBING_POISON, SPELL_HUNTER_CRIPPLING_POISON));

                _spellTimer = 0;
            }

            DoMeleeAttackIfReady();
        }

    private:
        bool _init;
        uint32 _spellTimer;
    };

    CreatureAI* GetAI(Creature* creature) const
    {
        return new npc_pet_hunter_snake_trapAI(creature);
    }
};

void AddSC_hunter_pet_scripts()
{
    new npc_pet_hunter_snake_trap();
}
